Vibration Suppression in Large Flexible Space Structures Using Active ControlTechniques

摘要

This report investigates the use of active vibration control techniques appliedto the PACOSS Dynamic Test Article as an experimental structure. In the course of the research, a mathematical model of the lightly damped experimental structure was created based on experimental data. This model was used in the design of two classes of controllers. The first class is pure rate feedback of the structure's measured states such that global stability is insured. The second type of controller investigated was an optimal controller (LQG) that was created using the truncated mathematical model. The rate feedback controller showed significant improvements in the damping of the structures flexible modes. The optimal controller proved to be stable only for negligible gains and did not improve structural damping significantly.... Large space structures, Dynamic control, Vibration damping structural vibration, Active control, Flexible spacecraft.